Inventories (Tables)

3 Months Ended

Mar. 31, 2014

Inventory Disclosure [Abstract]

Inventories

Inventories (principally using the last-in, first-out (LIFO) method) are comprised of the following:

(Millions of dollars)	March 31, 2014		December 31, 2013
Raw materials	$	3,031	$	2,966
Work-in-process	2,760		2,589
Finished goods	6,801		6,785
Supplies	296		285
Total inventories	$	12,888	$	12,625